Abstract
To determine whether manganese tolerance in rabbiteye blueberry (Vaccinium ashei Reade) is heritable, a 10-parent diallel cross was produced. A 250 ppm Mn solution (200 ml/plant) was applied to a sand culture, of the progeny daily. Visual ratings (1 - dead plant - 13 - no Mn toxicity symptom) were made after 6 weeks. Shoot weight and Mn content of leaves were determined. Narrow-sense heritability estimates (h 2 ) were 0.45±0.28 for Mn content, 0.49±0.27 for visual ratings, and 0.37± 0.21 for shoot weight. The genetic correlation between neither shoot weight nor visual rating and Mn content (0.11 and -0.15, respectively) was very high; however, the correlation between shoot weight and visual ratings (1.00) was extremely high. This suggests that visual ratings provide an estimate of Mn effects on plans equal to objective measurements of shoot weight. Though h 2 estimates for Mn content and visual ratings were similar, the lack of genetic correlation between the traits indicates that tolerance to Mn toxicity is independent of Mn content. The high h 2 for visual ratings suggests mass selection as the method of choice for improving Mn tolerance in a rabbiteye blueberry population.
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Claims 9
Claim · model-written summary
Narrow-sense heritability of leaf Mn content was 0.45±0.28.
Verbatim
e0“Narrow-sense heritability estimates (h 2 ) were 0.45±0.28 for Mn content”
t0“rabbiteye blueberry”
Claim · model-written summary
Narrow-sense heritability of visual ratings was 0.49±0.27.
Verbatim
e0“0.49±0.27 for visual ratings”
t0“rabbiteye blueberry”
Claim · model-written summary
Narrow-sense heritability of shoot weight was 0.37± 0.21.
Verbatim
e0“0.37± 0.21 for shoot weight”
t0“rabbiteye blueberry”
Claim · model-written summary
The genetic correlation of shoot weight with Mn content was 0.11.
Not reportedDirection
Verbatim
e0“The genetic correlation between neither shoot weight nor visual rating and Mn content (0.11 and -0.15, respectively) was very high”
t0“rabbiteye blueberry”
Claim · model-written summary
The genetic correlation of visual rating with Mn content was -0.15.
- Taxon
- rabbiteye blueberryt0
- Outcome
- genetic correlatione0
- Value
- -0.15e0
- Qualifier
- visual rating and Mn contente0
- Comparator
- Mn contente0
Not reportedDirection
Verbatim
e0“The genetic correlation between neither shoot weight nor visual rating and Mn content (0.11 and -0.15, respectively) was very high”
t0“rabbiteye blueberry”
Claim · model-written summary
The genetic correlation of shoot weight and visual ratings was 1.00.
- Taxon
- rabbiteye blueberryt0
- Organ / stage
- shoote0
- Outcome
- correlation between shoot weight and visual ratingse0
- Value
- 1.00e0
Not reportedDirection
Verbatim
e0“the correlation between shoot weight and visual ratings (1.00) was extremely high”
t0“rabbiteye blueberry”
Claim · model-written summary
Visual ratings were judged as effective as shoot weight for assessing Mn effects.
Verbatim
e0“visual ratings provide an estimate of Mn effects on plans equal to objective measurements of shoot weight”
t0“rabbiteye blueberry”
Claim · model-written summary
The authors inferred manganese toxicity tolerance is independent of Mn content.
- Taxon
- rabbiteye blueberryt0
- Outcome
- tolerance to Mn toxicitye0
- Qualifier
- independent of Mn contente0
- Comparator
- Mn contente0
Not reportedDirection
Verbatim
e0“tolerance to Mn toxicity is independent of Mn content”
t0“rabbiteye blueberry”
Claim · model-written summary
Mass selection was recommended for improving Mn tolerance in rabbiteye blueberry.
Verbatim
e0“mass selection as the method of choice for improving Mn tolerance in a rabbiteye blueberry population”